Mossy Cobblestone

Mossy Cobblestone is a red brown building-block with a stone-chip-pattern and a bit of green moss that you can craft in your Crafting Menu (default key "q") after finding and learning the according rare crafting Recipe for this block.

Even more rarely, the crafting Recipe for this block can be obtained from Things or Keepas of any kind either as a loot or pet-harvest.

In order to permanently add the recipe to your crafting menu (and so it can be carried over to all other Creativerse game worlds like all rare and store-bought Recipes), this recipe has to be learned at first by right-clicking on it in your inventory/bag or dragging it with the left mouse-button over your player character model on the right side of the inventory.